Harrow.



B. T. LOOKE.

HARROW.

APPLICATION FILED JULY 22, 1913:

Patented Feb. 9,1915.

2 SHEETS-SHEET 1.

Witweooeo I: PETERS 6b., F'HbTc-LITHQ, WASHINGTON. 0. CV

1. tries.

BENJAMIN T. LOGKE, 0F STARBUCK, WASHINGTON.

nARRow.

To all whom it may concern:

Be it known that I, BENJAMIN T. Looms, a citizen of the United States, residing at Starbuck, in the county of Columbia and State of Washington, have invented new and useful Improvements in Harrows, of which the following is a specification.

This invention relates to harrows, and it has for its principal object to produce a so-called reversible harrow of simple and improved construction wherein the position of the teeth may be reversed by simple and improved meansprovided for the'purpose.

A further object of the invention is to simplify and'improve the construction of the tool carrying bars and the manner of mounting the teeth with respect to the bars and the bars with respect to the frame.

With these and other ends in view which will readily appear as the nature of the invention is better understood, the same consists in the improved construction and novel arrangement and combination of parts which will be hereinafter fully described and particularly pointed out in the claims.

In the accompanying drawings has been illustrated a simple and preferred form of the invention, it being, however, understood that no limitation is necessarily made to the precise structural details therein exhibited, but that changes, alterations and modifications within the scope of the claims may be resorted to when desired.

In the drawings,-Figure 1 is a top plan view of a harrow section constructed in accordance with the invention. Fig. 2 is a vertical sectional view taken on the line 22 in Fig. 1. Fig. 3 is a vertical sectional view taken substantially at right angles to Fig. 2 on the line 33 in Fig. 1. Fig. 4 is 'a front elevation. Fig. 5 is a sectional view similar to Fig. 2, but showing the harrow teeth set or arranged in a diiferent manner., Fig. 6 is a transverse sectional view, enlarged, of one of the tooth carrying bars to illustrate more particularly the manner of mounting the teeth. Fig. 7 is a perspective detail view of one of the tooth carrying rock shafts detached from the harrow bar,showing also one of the teeth, the means for connecting the latter with the rock shaft and the adjusting lever or crank arm. Fig. 8 is an end view of the tooth carrying rock shaft.

Corresponding parts in the several figures are denoted. by like characters of reference.

Specification of Letters Patent.

Application filed July 22, 1913.

Patented Feb. 9, 1915..

Serial No. 780,509.

The harrow frame which is preferably constructed of metal includes the front and rear members 15 and the side members 16. The side members are bent to present each a series of steps orofisets 17, saidfront and rear bars bein bent symmetrically so that the steps or oflsets of said side bars will be disposed in parallel relation. The steps 17 serve to support the pivoted tooth carrying bars 18 which being symmetrically disposed will lie in parallel relation throughout.

Each of the bars 18 consists of a metallic tube which is provided at the ends thereof with journal members 19 engaging the frame members in such a manner that the tubular bars will be supported for free osclllation. Each of the bars 18 is provided with an upwardly extending arm 20, and the arms 20 are connected in series by means of a connecting bar 21, the latter being pivotally connected with each of the arms 20. One of the arms 20 has an upward extension 22 constituting a hand lever which is provided with a stop member 23 engaging a toothed segment 24: on the connecting bar 21. By this simple mechanism the bars 18 may be simultaneously rocked about their axes and secured at various adjustments.

Each of the bars 18 carries a plurality of teeth 25 which are mounted adjustably by means shown particularly in Figs. 6 and 7 of the drawings. Various kinds and patterns of teeth may be used, but for the purpose of illustration there have been shown spiked teeth of diamond shaped cross section. Each of the tubular bars 18 is transversely apertured for the reception of tubular rock shafts 26, each of which is provided at one end with a tooth engaging notch 27 and near the same end with an annular-flange or collar 28 which, when the parts are assembled, abuts on'one side of the tubular bar 18. Extending through each tubular rock shaft 26 is an eye bolt 29, the eye of which coincides with the notch 27 and serves for the reception of the tooth 25. The opposite end of the eye bolt projects beyond the tubular rock shaft and receives a crank 30 which is firmly secured by means including a nut 31 and a washer 32, it being understood that the end of the shaft may be squared, as shown at 27 to prevent the crank from turning about the axis of the eye bolt. When the parts are assembled,

the collar 28, as stated, abuts on one side of the tubular bar 18, and the tubular rock shaft is made of such length that the crank 30 will abut lightly on the opposite side of said tubular bar, but in such a manner as to permit the rock shaft to oscillate freely and 5 without danger of binding, this result being readily attained by properly proportioning the length of the tubular rock shaft with respect to the diameter of the tubular bar 18. It will be observed that when the parts are properly assembled, the eye bolt 29 will cause the tooth to be clasped tightly in the notch 27 of the tubular rock shaft, the walls of said notch being grooved, at 28, to receive the eye of the bolt, thus holding the said tooth securely at any desired adjustment. This construction admits of the teeth being readily detached for sharpening or for renewal when necessary, and wear on the points of the teeth may be readily compensated for icy-lowering the relative position of said teeth.

The arms or cranks 30 associated with the rock shafts 2.6 of each tooth carrying bar 18 are connected together in series by a connecting bar '33. For the purpose of actuating the connecting bar '33 to effect adjustment of the bars supporting the teeth a hand lever 34 is provided, said lever being fulcrumed on a toothed segment 35 which is mounted on one of the tubular bars 18 to provide a lever stand, and said lever being provided with a slot 36 for the passage of .a pin 37 whereby it is pivotally connected with the connecting bar 88. The hand lever 34 has a .stopmember .38 engaging the toothed segment 35. It will be seen that by this simple mechanism, the tubular rock [shafts 26 associated with the tubular bar 18 may be simultaneously oscillated so as to tilt 40 the teeth 25 to the desired position. It is obvious that each of the bars 18 willbe outfitted with teeth in the manner described.

Each of the front and rear bars 15 of the frame is provided with means such as keep- 5 ers 39- serving to .support vertically slidable legs 10, the lower ends of which are bent rearwardly to provide feet 41. Two such legs are provided at each end of the frame, said legs being connected at their upper ends with the outwardly extending arms of levers 42 which are fulcrumed on a stand 43 rising from the-end member of the frame.

Said stand also supports a hand lever 44;

having a stop member 15 adapted to engage .a toothed segment 46, and said hand lever is connected by means of a link47 with the inwardly extending arms of the levers 42. Said levers are provided with slots 48 engaging the pivot members 19 on which they are fulcrumed in order that they may be free to move properly when actuated by the hand lever. It will be seen that by manipulating the hand levers the legs may be raised or lowered with respect to the 55 frame and conversely the frame with respect to the legs. This is for the purpose of enabling the harrow frame to be lifted or elevated, thereby re ulating the depth to which the teeth will be permitted to enter the ground, the frame being supported on the feet 11 which constitute runners. One end member of the frame has been shown as being provided with eyes 50 for the attachment of draft, it being noted that the feet are bent rearward from said end so as to enable the harrow to ride freely over the ground.

In the use of the improved harrow draft may be attached in any suitable, convenient and well known manner to the front frame 30 bar 15. When draft is applied evenly to one of said bars it is evident that the tooth carrying bars 18 will be disposed transversely with respect to the line of draft, an arrangement whereby a staggered forma- 35 tion of the harrow teeth will be obtained.

It is obvious that by manipulating the hand levers 34 the teeth of each bar 18 may be tilted to positions at various angles to the longitudinal axis of said bar. It will, fur- 9o thermore, be seen that by manipulating the hand lever 22, the entire series of tooth carrying bars may be rocked about their axes so as to tilt the teeth to various positions transversely of the longitudinal axes of said bars. It follows that not only may the harrow teeth be disposed in various positions with respect to the line of draft, but also transversely thereof. The legs having the feet are obviously supported in a somewhat raised position when the harrow is in operation, but they may be lowered when the barrow is to be transported from one place to another. It will also be found possible, when an unusual amount of trash has accumulated, to clear the same from the machine by reversing the teeth so as to enable them to ride clear of the-trash which will be left behind. A plurality of harrow sections of the construction described may be connected with a riding attachment for simultaneous use.

Having thus described the invention, what is claimed as new, is

1. In a harrow, a tooth carrying bar, said bar being transversely apertured, a plurality of tubular rock shafts extending transversely through the bar, each rock shaft having a notched end and a flange adjacent to said notched end, eye bolts extending through the tubular rock shafts, teeth engaging the eye bolts and seating in the notches of the tubular "rock shafts,

cranks mounted on and engaging the tubular rock shafts adjacent to one side of the tubular bar, and nuts on the eye bolts for tightening and assembling the parts; in combination with a bar whereby the crank arms are connected in series, and adjusting and securing means.

2. In a harrow, a frame, a tubular bar, a tubular rock shaft extending transversely through the bar and projecting at one end, said projecting end being provided with a notch and with a flange abutting on the tubular bar, an eye bolt extending through the tubular rock shaft, a tooth engaging the eye bolt and the notch in the end of the tubular rock shaft, the walls of said notch having grooves to accommodate the eye of In testimony whereof I afiix my signature 15 in presence of two witnesses.

BENJAMIN T. LOOKE. Witnesses:

WM. R. PAxToN, C. F. WVELsH.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G." 

